Mohamed Sabry EL-Bady | National Research Centre (original) (raw)

Papers by Mohamed Sabry EL-Bady

were measured in road side soils samples in two size fractions ( 62.5 µm and 62.5 µm to 1mm). Av... more were measured in road side soils samples in two size fractions ( 62.5 µm and 62.5 µm to 1mm). Averages of concentrations of Pb, Cu, Co, Cd, Cr, Ni, and Zn in the road side soil samples along expressway between Mansoura and Cairo compared with Canadian soil quality guidelines (CSQGs) of Canadian Council of Ministers of the Environment.(CCME) and other standard of average shale. Contamination indices and ecological risk indices were analyzed to assess heavy metal contamination of road side soilst using single and integrated indices. In this study, contamination factor (CF), ecological risk factor (Er) and index of geo-accumulation (Igeo), as single indices, and the pollution load index (PLI), the degree of contamination (Dc) and the potential ecological risk index (RI), as integrated indices, were calculated.

The concentrations of Fe, Mn, Zn, Pb, Cu, and Cd in bottom sediment collected from ten stations f... more The concentrations of Fe, Mn, Zn, Pb, Cu, and Cd in bottom sediment collected from ten stations from Bardawil Lagoon were determined by atomic absorption spectrometry. The descending order of the heavy metals concentrations was as follows: Fe> Mn> Zn> Cu> Pb> Cd. Contamination indices were used to assess the heavy metal pollution of the investigated bottom sediments of Bardawil lagoon using single and integrated indices. These indices include the Contamination Factor, Degree of Contamination, Enrichment Factor, Geo-accumulation index, Ecological Risk Factor and Index.

The area of study extends about 65 km from Gamasa City to Burg El-Burullus. The coastal sand dune... more The area of study extends about 65 km from Gamasa City to Burg El-Burullus. The coastal sand dunes are very near to the shoreline in Baltim and El-Burg and far from the shoreline in Gamasa. It is narrow with relatively steep slope northward near Burg El-Burullus and Baltim, while it increases in width eastward to become wide with gentle slope near Gamasa. The coastal sand dunes are very mobile and move toward the agricultural lands, roads (international coastal road), resorts, and other developmental activities. The sand dunes in the study area are classified into two categories, the old fixed dunes and recent mobile dunes. The main directions of wind blow are N, W, and NW directions. It causes the movement of mobile dunes (Barchan and longitudinal). Several methods have been used for dune fixation like the tar spraying, wind fences and stones. Wind fences are not costly and nonpolluting if compared with stonewall and tar spraying, which prevent the land utilization for agricultural purposes. 185 186 Environment, People and Development

The balance between resources and population constitute the solid base for drawing the future map... more The balance between resources and population constitute the solid base for drawing the future map of sustainable development in the study area in all developmental sectors such as agriculture, industry, tourism, and commercial sectors. Geoenvironmental hazards such as erosion, sea level changes, sand dune encroachment, siltation of the navigation channel of the Damietta harbor, salinization of the soils, the negative effects of the protective structures and bad management of the coastal areas must be studied in details before making the future planning for any area. The main geomorphologic units in this area are: beaches, sand dunes, wetlands, urban areas, reclamation lands and lagoons. The rate of erosion from 1984 to 2000 in the Rosetta beach is -117.6 m/yr, while it is -17.6 m/yr in the Damietta beach. On the other hand, the rate of erosion in the period from 1984 to 2005 is -104.6 m/yr and -11.4 m/yr in Rosetta and Damietta beaches, respectively. Since, Nile Delta is a typical wave dominated delta (Coleman et al., 1981) and Tide is a semi-diurnal microtidal 151 152 Environment, People and Development regime with a maximum tidal range of 50 cm (UNESCO/UNDP, 1978), the erosion and accretion are very dangerous hazard in the area. Due to the reclamation of vast areas of the coastal dunes, the lagoons and wetlands, the new reclaimed lands are added to the agricultural deltaic land. Thus, the coastal sand dunes, lagoons and wetlands are decreased. The main urban centers have expanded, and new urban centers (Damietta harbor, the New Damietta city and Mansoura city in near future) have been constructed at the expense of vast areas of lagoons, coastal dunes, and backshore flats. The siltation of the navigation canal of the Damietta harbor, salting of the soil (new and old) and sand dune encroachment are very important hazards in the study area. All the previous geoenvironmental hazards and others threaten the sustainable development in the study area.

Damietta Nile Branch is about 225 km long with variable widths of 300 and 500 m. Its depths range... more Damietta Nile Branch is about 225 km long with variable widths of 300 and 500 m. Its depths range from 3 to 13 m. The concentrations of Fe, Mn, Pb, Cd, Cu, Ni, and Zn in bottom sediment of Damietta Nile Branch were determined by atomic absorption spectrometry. Where, Eleven bottom sediment samples were collected along the Damietta Nile branch from the south (Cairo) to north (Damietta). The mean concentrations of heavy metals in bottom sediment were as follows: Fe: 15321-.31723 mg/kg, Mn: 588-2021 mg/kg, .60 mg/kg. In view of the concentration levels of studied heavy metals, the highest values were Fe, Mn at all locations. The pollution of sediments by heavy metals revealing that Fe mean concentration showed heavily polluted category in the study area, Mn showed sever effect level, Cd showed lowest effect level, Cu showed nearly heavily polluted category and Pb showed lowest effect level in the study area. Many assessment methods were applied using certain indices to assess the environmental impacts on sediments or the heavy metals pollution of the bottom sediments of Damietta Nile branch. These indices include the Enrichment Factor, Contamination Factor, Pollution Load Index and Geo-accumulation index.

Egypt's Red Sea coast runs from the Gulf of Suez to the Sudanese border. The length of the study ... more Egypt's Red Sea coast runs from the Gulf of Suez to the Sudanese border. The length of the study area between Mersa um Gheig and Ras Banas is about 240 km. The main geomorphological unit in the study area includes mountains (basement), shoreline, beach, alluvial fan, and flood plain. The study area studied by tow methods: 1-sedimentological and mineralogical (Geologic) methods 2-remote sensing methods. The geologic method give a light picture about the composition of the beach, where the beach sediments range from calcareous sand in the north of the study area (Mersa um Gheig, the sand percent 86.83%) to carbonate beach in the south of the study area (Ras Banas, the carbonate percent 96.78%). Also the heavy minerals in the beach sand studied in fine (0.250-0.125mm) and very fine(0.125 -0.063mm) fractions (average percentages of two fractions) to shed more light on the nature of the source rocks and their sedimentary history. Opaques and non Opaques (Amphibole, Epidote, staurolite, Zircon, Muscovite, Chlorite, Garnet, Rutile) are studied in detail as averages in both fine and very fine fractions. The heavy metals (elements) in the study area estimated and interpreted, where, Ba range from 10.1 to 315 ppm, Sr range from 548 to 2800 ppm, Cr range from 0.0 to 250 ppm, , Ni range from 0.0 to 103ppm, Cu from 10 to 35ppm, Zn from 0.0 to 94 ppm, Sc from 0.0 to 17.6 ppm, V from 0.0 to 277 ppm, Y from 0.0 to 9ppm, and Mo from 2 to 16 ppm. The remote sensing method also used in this area for study the sedimentation changes in many selected sites. Finally the purpose of this study is determination the geological and environmental properties of each beach in the selected sites and the suitable of each site for different sustainable development activities.

The present work attempts to establish the distribution of Iron, Aluminum, Manganese, Zinc, Coppe... more The present work attempts to establish the distribution of Iron, Aluminum, Manganese, Zinc, Copper and Lead in the Bottom sediments of Ismailia Canal. Where, nine bottom sediment samples were collected along the Ismailia Canal from the mouth of canal at Cairo eastward to Ismailia governorate. Elements concentrations in bottom sediments were varied between 14002-22865; 19125-38025;288-687; 40.3-99.5; 17.2-68.5 and 8.2-28.3 mg/kg for Fe, Al, Mn, Zn, Cu, and Pb respectively. The enrichment factors, geoaccumulation index, contamination factors, pollution load index, degree of contaminations were determined. Many of previous indices showed that the studied area has low degree of contamination and no pollution in most of the studied area except in the area near Cairo. Effects Range-Low (ERL) and Effects Range-Median; (ERM) are used to reveal adverse biological effect for heavy metals in sediment as well as TEL, LEL, MET, TET, SEL and PEL are used to evaluated the quality of bottom sediments.

The present work attempts to establish the distribution of Iron, Copper, Cobalt, Nickel, Zinc, Le... more The present work attempts to establish the distribution of Iron, Copper, Cobalt, Nickel, Zinc, Lead, Cadmium and Chromium in the soils of Bahr EL-Baqar Region. Where, eight soil samples were collected from Bahr EL-Baqar Region, South of EL-Manzala Lake. Elements (Metals) concentrations in the soils were varied between 11987.

The present article is a comparative study on the mineralogical as well as the geochemical charac... more The present article is a comparative study on the mineralogical as well as the geochemical characters in Burullus lake sediments and Bardawil lake sediments, Mediterranean sea coast, Egypt. Mineralogically, the heavy mineral assemblage recorded from lake Burullus samples are particularly enriched with unstable minerals (pyroxenes and amphiboles and epidotes) accompanied by lower contents of ultrastable minerals (zircon, tourmaline and rutile), reflecting a provenance dominated by basic igneous rocks. For Lake Bardawil samples, the sediments are characterized by substantially higher contents of ultrastable minerals (zircon, tourmaline and rutile), beside a subordinate component of pyroxenes and amphiboles, minerals of metamorphic affinity such as staurolite and garnet constitute a recognizable part of the total non-opaque fraction. The clay mineral suit detected in lake Burullus samples is uniform in most of the investigated area suggesting constancy of the source area, it is dominated by smectite with subordinate amount of kaolinite and lesser illite contents. The recorded clay minerals in Bardawil samples are a mixture of smectite, kaolinte and illite with variable contents from one location to another reflecting variability in source rocks. Smectite tends to be more abundant in the western samples while illite increases eastwards, however, kaolinite constitutes a noticeable part in most of the investigated samples. The recorded heavy mineral assemblage, the identified clay mineral suit as well as the results obtained from the geochemical data, revealed that, the investigated lake Burullus sediments were derived mainly from one source which is dominated by mafic components. They are most probably derived and related to the Quaternary Nile sediments. On the other hand, the Bardawil lake sediments reflect derivation from more than one source, they originated mainly from reworked sediments especially Nubian sand stone, high rank metamorphic and basic igneous rocks derived from the neighboring sand dunes. Fluvial Niolitic sediments must be considered also as an important additional source. [Samy, Y. M. and El-Bady, M.S.M. Comparative study of the mineralogy and geochemistry of the Burullus and Bardawil lake sediments, Mediterranean Sea Coast, Egypt. Life Sci J 2014;11(9):686-700]. (ISSN:1097-8135). http://www.lifesciencesite.com. 105